Stamm upgrade of Lowther

I tend to get phone calls from people aware that I know my way around repairing Lowther units.

Last summer I had the pleasure to get my hands on a pair of Stamms for repair and they were fascinating. I haven't been impressed with other Lowther clones, notably AER whose snake-oil claim that they reproduce up to 80kHz doesn't impress me. But Stamm knew what he was doing.

The owner of the Stamms is a record producer and he's succumbed to a pair of Tannoy 15 inch units, simply as they're standard kit, and therefore selling his Loth-X fitted with Stamm.

These units I fitted with spider and surround that will not rot and if those units don't last 100 years I'll be surprised. On ebay at the moment - https://www.ebay.com/i/193824270639

Best wishes

David P
 
Hi,
i do have a pair of Lowther PM6A equivalents made in the early 1970s, which i had reconed by Stefan Stamm here in Berlin 10 years ago. I´ve been using them in a MLTL design as recommended by martin king, which i didn´t like too much. I preferred the sound of the original Acousta enclosures, even though they had been built very poorly.
Now i want to try something new since i do have access to a proper workshop currently. I found a LothX Troubadour design, which was supposed to work with Stamm drivers, i don´t know too much about. I did remodel it in CAD and took its dimensions into hornresp. Since i never used hornresp before, i am a little bewildered by the results.
I am very unsure if this is a viable backloaded horn design for my lowthers. What do you say?

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